融雲會話裏添加附加信息

融雲版本2.3.6
在會話界面重寫方法:
- (RCMessageContent )willSendMessage:(RCMessageContent )messageCotent{
if ([messageCotent isKindOfClass:[RCTextMessage class]]) {

    RCTextMessage *textMessage = (RCTextMessage*)messageCotent;

    textMessage.extra = @"附加信息";

    return textMessage;

}else if([messageCotent isKindOfClass:[RCImageMessage class]]){
    RCImageMessage *imageMessage = (RCImageMessage *)messageCotent;
    imageMessage.extra = @"附加信息";

}else if ([messageCotent isKindOfClass:[RCVoiceMessage class]]){
    RCVoiceMessage *voiceMessage = (RCVoiceMessage *)messageCotent;
    voiceMessage.extra = @"附加信息";
}

 return messageCotent;

}

在會話界面可以接收到附加的信息:
for (RCMessageModel *model in self.conversationDataRepository) {
if ([model.content isKindOfClass: [RCTextMessage class] ]) {

        RCTextMessage *textMessage = (RCTextMessage *)model.content;

        NSLog(@"textMessage.extra==%@",textMessage.extra);

    }
}